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A mass of solid potassium chlorate undergoes thermal decomposition in the presence of a catalyst (manganese dioxide) to produce solid potassium chloride and oxygen gas. As a result, 250mL of oxygen are collected over water at 26.0 degrees C and a total pressure of 760.0 Torr. What is the mass of potassium chlorate that decomposed?
When concentrated sulfuric acid (18.0 M) is added to sodium chloride, hydrogen chloride gas is formed.
Concentration of H 2 is observed 2.15 moles/L When the reaction N 2 (g) + 3 H 2 (g) ?? 2 NH 3 (g) comes to equilibrium. Determine the numerical value of the Kc equilibrium constant?
Draw a diagram showing the stratification in a body of water. Label the different layers and describe the type of chemistry (and species) that occurs at each level.
If pure PbI2 is allowed to dissolve in water and produces 5.0 x 10^-3 M I- what value of ksp can be derived
Cobalt-60 exhibits first order decay and has a half-life of 5.26 years. If it must be replaced in a radiotherapy unit when its radioactivity decreases to 75% of its original value, how long can a 1.00 g sample be employed?
As of the writing of this text, EPA standards limit atmospheric ozone levels in urban environments to 84ppb. How many moles of ozone would there be in the air above Los Angeles County.
calculate the weight of sodium hypochlorite, NaOCl.
Explain the factors that affect the acidity of carboylic acids. Why does this matter/ give evidence to support your claims and use a reaction
Determine the percent yield of barium sulfate If the actual yield = 0.456 grams?
To the alchemists, gold was the material representation of purity. It is a very soft metal that can be hammered into extremely thin sheets. If a 1.07 g piece of gold is hammered into a sheet whose area is 30.0 ft2,
How many grams of dry NH4Cl need to be added to 2.30 L of a 0.100 M solution of ammonia,NH3, to prepare a buffer solution that has a pH of 9.00
How much energy must be supplied to break a single 6Li nucleus into separated protons and neutrons? (masses: 6Li, 6.01347; 1H, 1.00728; 1n, 1.00867 amu)
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